Description

Disodium 8-[(4-Acetamidophenyl)Azo]-5-[(4-Amino-7-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its value lies in its precise chemical structure, which serves as a critical building block for producing vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply chains for their production processes.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Textile Dye Manufacturing: Used to produce dyes that offer excellent wash-fastness and brightness for the textile industry.
• Inkjet Ink Formulations: Serves as an intermediate for pigments and dyes used in high-quality digital printing inks.
• Specialty Coatings and Paints: Employed in the development of colored coatings requiring specific lightfastness and chemical resistance properties.
• Leather and Paper Dyeing: Used in the production of dyes for coloring leather and specialty papers.
• Research & Development: A valuable compound for R&D laboratories focusing on novel chromophores and dye chemistry.

Basic Information

Product Name	Disodium 8-[(4-Acetamidophenyl)Azo]-5-[(4-Amino-7-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate
CAS No.	68540-97-6
Molecular Formula	C34H24N6Na2O8S2
Molecular Weight	762.68 g/mol
Synonyms	Disodium 8-[(4-acetamidophenyl)azo]-5-[(4-amino-7-sulphonato-1-naphthyl)azo]naphthalene-2-sulphonate; C.I. Reactive Black 5 Intermediate; Reactive Black 5 Precursor; Azo Dye Intermediate 68540-97-6; 5-[(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-8-[(4-(acetylamino)phenyl)azo]-2-naphthalenesulfonic acid disodium salt; Disodium 5,8-bis[(4-substituted phenyl)azo]naphthalene-2,7-disulphonate derivative
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.